class variableTest {
    public static void main(String[] args) {
        // String name = "jack";
        // int age = 19;
        // byte num = 121;
        // boolean isMan = false;
        // System.out.println("name is " + name + ", age is " + age);

        // byte x1 = 'a';
        // int x2 = 12;
        // System.out.println(x1 + x2);

        // short x3 = 124;
        // long x4 = 3672632l;
        // System.out.println(x3 + x4);

        // short x5 = 123;
        // int x6 = x5;
        // byte n = '\n';
        // System.out.println(x6 + "" + n + "" + x6);

        String x8 = "test";
        int x9 = 999;
        System.out.println(x8 + x9);
    }
}